Transportation system

• US 20060271252A1
• Filed: 05/11/2006
• Published: 11/30/2006
• Est. Priority Date: 05/26/2005
• Status: Abandoned Application

• Current Assignee: Murata Machinery Limited (Muratec)
• Original Assignee: Murata Machinery Limited (Muratec)
• Inventors: Hori, Kikuo, Ueshima, Kazuro
• Application Number:
  US11/431,512
• Publication Number:
  US 20060271252A1
• Time in Patent Office: Days
• US Class Current: 701/23
• CPC Class Codes: G05D 1/0236 in combination with a laser lasers per se H01S
• CPC Class Codes: G05D 1/0261 using magnetic plots
• CPC Class Codes: G05D 1/0272 comprising means for registering the travel distance, e.g. revolutions of wheels measuring distance traversed on the ground by vehicles, e.g. using odometers G01C22/00
• CPC Class Codes: G05D 1/0274 using mapping information stored in a memory device navigation using map-matching G01C21/30
• CPC Class Codes: G05D 1/0297 by controlling means in a control room
• CPC Class Codes: G08G 1/20 Monitoring the location of vehicles belonging to a group, e.g. fleet of vehicles, countable or determined number of vehicles

Abstract

A guided vehicle controller 20 transmits the standard time to a guided vehicle 14. The guided vehicle 14 reports a coordinate representing the current position and the transmission time to the controller 20. The controller 20 generates time series data obtained by combining the transmission time and the coordinate. Based on the time series data, the current coordinate of the guided vehicle is estimated. By converting current coordinates of a plurality of guided vehicles into the distribution of guided vehicles, instructions about the travel routes are provided to the guided vehicles for congestion avoidance. Further, a suitable guided vehicle capable of efficiently executing a transportation command is selected, and the transportation command is assigned to the selected guided vehicle.

Claims

1. A transportation system including a plurality of transportation apparatuses and a controller for management of the apparatuses, wherein

each of the transportation apparatuses comprises means for reporting status of the each apparatus together with time to the controller, and wherein

the controller comprises:

estimation means for estimating at least current status of the each transportation apparatus based on the reported status of the each apparatus together with the time; and

status evaluation means for determining status of the system based on the estimation.

2. The transportation system of claim 1, wherein the each transportation apparatus is a guided vehicle, the guided vehicle reports a coordinate along a travel route as the status of the each apparatus, the guided vehicle.

3. The transportation system of claim 2, wherein the status evaluation means determines distribution of the guided vehicles on the travel route, and at least one of the controller and the guided vehicle searches a travel route based on the determined distribution for collision avoidance.

4. The transportation system of claim 2, wherein a plurality of beacons are provided along the travel route, and each of the guided vehicles comprises:

an encoder for determining a traveling distance;

means for reading the beacon; and

means for determining the coordinate along the travel route with the read beacon and the traveling distance determined by the encoder after reading the beacon.

5. The transportation system of claim 4, wherein the estimation means estimates a current coordinate of the each guided vehicle, based on time series data of the coordinate along the travel route of the each guided vehicle together with the time.

6. The transportation system of claim 4, wherein when each guided vehicle passes a branch in the travel route, the each guided vehicle reports a direction of passing the branch to the controller together with the coordinate along the travel route.